Typewriter attachment



April 16, 1935. JENSEN l 1,998,196

TYPEWRITER ATTACHMENT Filed June 22, 193s s sheets-sheet 1 i A A fg ,Q

April 16, 1935. L. JENSEN TYPEWRITER ATTACHMENT Filed June 22, 1933 5 Sheets-Sheet 2 R mwl dllllllllllllllllllll n April 16, 1935. L. JENSEN 1,998,196

TYPEWRITER ATTACHMENT Filed June 22, 1953 s sheets-sheet s Etf Louw e726@ Patented Apr. 16, 1935 uNlTED STATES *PATENT ori-ica mnwnnran Arracmmn'r Anuman :une zz, 1933, sei-n1 No. anni 8Claims.

'I'his invention relates to typewriters adapted to illl in forms on continuous form stationery, and more particularly to an improved device for holding carbon strips interleaved with the statlonery. while the completed forms are advanced beyond the areas served by the carbons.

'I'he primary purpose of the present invention is to provide a carbon-holder which is pivotally mounted on the shiftable platen carriage so as to move forward with the stationery as it is advanced by the platen roll and associated presser-means, and to provide means for locking the carbon-holder in its rearmost position to facilitate transfer of the carbon from an advanced to a succeeding set oi forms. A

A ilurtherobject` of the invention is to provide a machine with a movably mounted nger-rest near the upper front portion oi ,the machine against which the stationery may be pressed to facilitate severance of a completed set of forms, and to connect the finger-rest with the carbonholder locking mechanism so that when the finger-rest is used, the carbon-holder is automatically released.

The invention is illustrated in a preferred embodiment in the accompanying drawings, in which Figure l is a side elevational view of a machine embodying the invention; Fig. 2 is a fragmentary side elevational view of the same showing the carbon-holder in unlocked position; Fig. 3 is a broken plan view of the carbon-holder supporting mechanism, taken'as indicated at line 3-3 of Fig. i; Fig. e, a broken perspective view of the same; Fig. 5, a broken side elevational view ci the attachment with carbon-holder in its foremost position; Fig. 6, a plan view of the supporting arms for the attachment; Fig. 7, a broken sectional view showing how the supporting arms are attached to the shiftable platen carriage, taken as indicated at line l of Fig. 6; and Fig. 8, a broken elevational view showing a modication in which the finger-rest is connected with the carbon-holder release mechanism.

Referring to the drawings, A designates the main frame of the typewriter machine; B, a shiftable platen carriage equipped with a platen roll B'; C, a typewriter attachment which is attached to the carriage B and partially supported by the main frame of the machine; and D, release for unlocking the carbon-holder.

The frame A may be of well known construction and is equipped with a transversely shiftable platen carriage B in which the platen roll B' is rotatably mounted. Suitable presser-means are provided for pressing stationery strips lil against the platen roll so that when the roll is turned, the stationery will be fed thereby.

As shown in Fig. 7, the platen carriage supports a pair of downwardly extending arms II (c1. 1oz-12s) which are held in position by means of screws I2. A U-shaped member I3 is rigidly connected to the lower portion of the arms Il and provides journals fora rock shaft Il. The member i3 also provides journal' members I5 having forwardly and upwardly extending guide lingers I5'. Rollers I6 are mounted on pintles I1 which are journaled in the members I5. A yoke I8 is also rigidly connected to the mid point of the arms II by spot-welding or other suitable means.

The oscillatable portion of the typewriter attachment comprises a cross member I9 which supports, at each end, a pair of upwardly extending pins on which carbon-supporting blades 2i may be mounted. 'Ihe carbon supporting blades may be oi the same type shown in my co-pending application, Serial No. 669,25e, led May 3,. 1933. -Aguide plate 22 is rigidly secured to and extends rearwardly from the cross member I. 'I'he member 22 is provided at its end portions with upwardly extending guide members 23 and upwardly extending supporting ngers 24 in which a guide roller 25 is journaled. The cross member I9 is further provided with downwardly extending arms 2E which are rigidly connected to the rock shaft tl. It will be un= derstood. that the rearward travel of the arms E@ will be limited by the yoke iii. A spring 2li' is provided on theshaft It and urges the mechanv nism to its rearmost position.

In order that the arms 26 may be locked in their rearmost position, a simple locking mechanism is provided which comprises a U-shaped member 2B which is pivotally mounted on supporting brackets 29, which extend forwardly from the arms il. The rearwardly extending portions of the member 28 comprises triggers 3d having cut-away portions to provide shoulders 3i which lie in the path of studs 32 mounted on the arms 26. A small tension spring 33 is provided to raise the triggers into locking position. The member 28 is provided at its front end with a downwardly extending actuating arm 28, so that when the arm is moved forwardly, the triggers are depressed from locking position. In order that the triggers will not return to the locking position when the arm 28a is released, spring catches 34, having cut-away portions 35, are rigidly connected to the arms 26 by means of rivets 36. The triggers 30 are provided with outwardly extending studs 31 which are adapted to slip under the spring catches 34 and hold the mechanism unlocked until the arms 26 are oscillated forwardly, as shown in Fig. 2.

A transversely extending rail I0 is supported by brackets 4I connected to the main frame of the typewriter.' This rail is engaged bythe rollers I6 and fingers I5a so as to provide a substantial support for the movable mechanism.

Figs. 1 and 2, a bell crank 45 is pivotallyconnected at 46 to the main frame of the machine. The front portion of the bell crank may be provided with a finger button 41. The rear portion -of the .bell crank is connected at 4,8 to a link 49 which, in turn, is pivotallyv connected at 5|) to the member 42. Thus, it will be understood that when the button 41 is depressed, the triggers 30 will be rocked down into the spring catches 34 and the mechanism will remain unlocked until the arms 25 are drawn forwardly and permit the triggers to spring out of engagement with the catch and back into apposition where they may automatically engage the studs 32 when the arms again reach their rearmost position.

In the modification shown in Fig. 8, a ngerrest 55 is pivotally connected at 55 tothe main frame of the machine. A leaf-spring 51 holds the finger-rest yieldingly. One end of the iinger-rest is provided with a flange 58 to which is connected a rod 59 which, in turn, is connected to the bell crank 45 at 60, in place of the finger button 41. In the modified form it will be understood that when the stationery is pressed downwardly against the nger-rest to separate the forms along their transverse lines of weakening, the mechanism will be unlocked automatioally.

The stationery I0 may be in the form of individual strips or may be fanfolded as desired. 'I'he stationery is led over the roll 25 and interleaved with forwardly extending strips of carbon, which are anchored at their rear ends on the supporting blades 2i. The ends of the strips are fed between the platen-roll B and its associated presser means andthe triggers 30 are depressed from locking position'before commencing the writing operation so that the carbon strips and their holder will be free to move forwardly, as shown in Fig. 5, as the writing progresses. After a set of forms has been completed, the platen roll is backed up and the stationery removed from the machine. This permits the carbon-holder to swing back to its rearmost position where it will automatically be locked. 'I'he operator may then grasp the ends of the stationery and draw them forwardly over the machine while the carbon strips, being held, will be transferred to the next succeeding set of forms. The completed set of forms may then be severed by pressing them against the finger-rest and pulling them apart at the ,line of weakening between sets of forms. If the finger-rest shown in Fig. 8 is employed, this action will automatically unlock the carbon-holder and the stationery is ready to be fed into the typewriter for the next operation.

While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims, in which it is my intention to claim all novelty inherent in my invention as broadly as possible, in View of the prior art.

I claim:

1. In combination with a typewriting machine having a main frame and a shiftable platen carriage provided with strip-feeding means; carbonstrip holding-means pivotally mounted on an extension of said carriage so as to be drawn forwardly by connected carbon-strips advanced by said strip-feeding means; locking means for locking said holder against oscillation; and means mounted on said frame for releasing said lockingmeans.

2. A device as specified in claim 1, in which the locking means comprises a trigger mounted von the platen carriage and adapted to automatically lock the carbon holder when the latter is moved to its rearmost position.

3. A device as specified in claim 1 in which the locking-means comprises a trigger mounted on the platen carriage and adapted to automatically lock the carbon holder when the latter is moved to its rearmost position; and spring-means is provided for holding said trigger out of operative position after being released and before the carbon holder is moved forwardly.

4. In combination with a typewriting machine having a shiftable platen carriage and equipped at .its upper front'portion with a yielding fingerrest means adapted to be depressed in the act of severing strips of stationery thereon; a carbon holder oscillatively mounted on the machine; locking-means for holding said carbon-holder in v its rearmost position; and means operated by the movement of said finger-rest for releasing said locking-means.

5. In combination with a typewriting machine having a main frame and a shiftable platen carriage; a track mounted on the lower rear portion of said frame; a downwardly extending supporting arm mounted on said carriage and provided with a roller adapted to engage said track; a rearwardly extending yoke mounted on said supporting arm; a carbon-holder pivotally connected to the supporting arm so as to swing back within said yoke; a trigger pivotally mounted on said supporting arm and adapted to lock the carbonholder against forward movement; and a transversely extending bar pivotally mounted on said frame and adapted to release said trigger, said arm being connected to a finger-operated mechanism at the front of the machine.

6. Mechanism as set forth in claim 5, in which the finger-operated mechanism comprises a movably mounted finger-rest with which the typewriting machine is equipped, said finger-rest being adapted to facilitate severing of forms from continuous-form stationery strips.

7. Mechanism as set forth in claim 5, in which the finger-operated mechanism comprises a iinger-rest movably mounted on the upper front portion of the typewriting machine, said fingerrest being adapted to facilitate separation of completed portions of stationery led thereover.

8. In combination with a typewriter machine through which stationery strips having interleaved carbon-strips may be led; carbon-strip holding-means mounted on a rearward extension of said machine so as to be drawable forwardly by said carbon-strips; spring-means urging said carbon-holder to its rearmost position; a latching device for automatically locking said holder invits rearmost position against forward movement; and means near the front of said typewriter for releasing said locking means.

LOUIS JENSEN. 

